From 18547b9c2297cb8698526286e65fffd3e8cf7ec5 Mon Sep 17 00:00:00 2001
From: Andrii Chebukin <XperiAndri@Outlook.com>
Date: Wed, 2 Jul 2025 02:51:37 +0400
Subject: [PATCH] feat(tests): run in parallel

---
 CHANGELOG.md                                              | 1 +
 tests/FSharpLint.Console.Tests/Attributes.fs              | 7 +++++++
 .../FSharpLint.Console.Tests.fsproj                       | 1 +
 tests/FSharpLint.Core.Tests/Attributes.fs                 | 8 ++++++++
 tests/FSharpLint.Core.Tests/FSharpLint.Core.Tests.fsproj  | 1 +
 .../Rules/Conventions/CyclomaticComplexity.fs             | 1 +
 tests/FSharpLint.Core.Tests/Rules/Hints/HintMatcher.fs    | 2 +-
 tests/FSharpLint.FunctionalTest/Attributes.fs             | 7 +++++++
 .../FSharpLint.FunctionalTest.fsproj                      | 1 +
 9 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 tests/FSharpLint.Console.Tests/Attributes.fs
 create mode 100644 tests/FSharpLint.Core.Tests/Attributes.fs
 create mode 100644 tests/FSharpLint.FunctionalTest/Attributes.fs

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd35bc449..5d84105ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Migrate to .NET `9.0.201` and FCS `43.9.201` #722 [@xperiandri]
 - Write test logs to test context output #722 [@xperiandri]
 - Use string interpolation instead of `+` concatenation #724 [@xperiandri]
+- Run tests in parallel #728 [@xperiandri]
 
 ## [0.24.2] - 2024-02-29
 
diff --git a/tests/FSharpLint.Console.Tests/Attributes.fs b/tests/FSharpLint.Console.Tests/Attributes.fs
new file mode 100644
index 000000000..72e9f9789
--- /dev/null
+++ b/tests/FSharpLint.Console.Tests/Attributes.fs
@@ -0,0 +1,7 @@
+namespace FSharpLint.Console.Tests
+
+open NUnit.Framework
+
+[<assembly: Parallelizable(ParallelScope.Fixtures)>]
+
+do ()
diff --git a/tests/FSharpLint.Console.Tests/FSharpLint.Console.Tests.fsproj b/tests/FSharpLint.Console.Tests/FSharpLint.Console.Tests.fsproj
index f6bf54bcd..e29572d64 100644
--- a/tests/FSharpLint.Console.Tests/FSharpLint.Console.Tests.fsproj
+++ b/tests/FSharpLint.Console.Tests/FSharpLint.Console.Tests.fsproj
@@ -7,6 +7,7 @@
 
   <ItemGroup>
     <Compile Include="TestApp.fs" />
+    <Compile Include="Attributes.fs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/tests/FSharpLint.Core.Tests/Attributes.fs b/tests/FSharpLint.Core.Tests/Attributes.fs
new file mode 100644
index 000000000..1008e54b5
--- /dev/null
+++ b/tests/FSharpLint.Core.Tests/Attributes.fs
@@ -0,0 +1,8 @@
+namespace FSharpLint.Core.Tests
+
+open NUnit.Framework
+
+[<assembly: Parallelizable(ParallelScope.All)>]
+[<assembly: FixtureLifeCycle(LifeCycle.InstancePerTestCase)>]
+
+do ()
\ No newline at end of file
diff --git a/tests/FSharpLint.Core.Tests/FSharpLint.Core.Tests.fsproj b/tests/FSharpLint.Core.Tests/FSharpLint.Core.Tests.fsproj
index 1924d3f2d..3d82af5a0 100644
--- a/tests/FSharpLint.Core.Tests/FSharpLint.Core.Tests.fsproj
+++ b/tests/FSharpLint.Core.Tests/FSharpLint.Core.Tests.fsproj
@@ -92,6 +92,7 @@
     <Compile Include="Framework\TestAbstractSyntaxArray.fs" />
     <Compile Include="Framework\TestExpressionUtilities.fs" />
     <Compile Include="Framework\TestSuppression.fs" />
+    <Compile Include="Attributes.fs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/tests/FSharpLint.Core.Tests/Rules/Conventions/CyclomaticComplexity.fs b/tests/FSharpLint.Core.Tests/Rules/Conventions/CyclomaticComplexity.fs
index ba207271e..271a7a1a1 100644
--- a/tests/FSharpLint.Core.Tests/Rules/Conventions/CyclomaticComplexity.fs
+++ b/tests/FSharpLint.Core.Tests/Rules/Conventions/CyclomaticComplexity.fs
@@ -110,6 +110,7 @@ let private matchBang len =
     |> makeProgram "a"
 
 /// Tests for the cyclomatic complexity rule.
+[<SingleThreaded>]
 type TestConventionsCyclomaticComplexity() =
     inherit TestAstNodeRuleBase.TestAstNodeRuleBase(rule { Config.MaxComplexity = MaxComplexity; })
 
diff --git a/tests/FSharpLint.Core.Tests/Rules/Hints/HintMatcher.fs b/tests/FSharpLint.Core.Tests/Rules/Hints/HintMatcher.fs
index a11b02433..fc4627025 100644
--- a/tests/FSharpLint.Core.Tests/Rules/Hints/HintMatcher.fs
+++ b/tests/FSharpLint.Core.Tests/Rules/Hints/HintMatcher.fs
@@ -11,7 +11,7 @@ type Assert with
     else
         raise (NUnit.Framework.AssertionException($"No errors were expected, but there were some errors. Errors were:\n{this.ErrorMsg}"))
 
-[<TestFixture>]
+[<TestFixture; SingleThreaded>]
 type TestHintMatcher() =
     inherit TestHintMatcherBase.TestHintMatcherBase()
 
diff --git a/tests/FSharpLint.FunctionalTest/Attributes.fs b/tests/FSharpLint.FunctionalTest/Attributes.fs
new file mode 100644
index 000000000..367f9b7b7
--- /dev/null
+++ b/tests/FSharpLint.FunctionalTest/Attributes.fs
@@ -0,0 +1,7 @@
+namespace FSharpLint.FunctionalTest
+
+open NUnit.Framework
+
+[<assembly: Parallelizable(ParallelScope.Fixtures)>]
+
+do ()
\ No newline at end of file
diff --git a/tests/FSharpLint.FunctionalTest/FSharpLint.FunctionalTest.fsproj b/tests/FSharpLint.FunctionalTest/FSharpLint.FunctionalTest.fsproj
index 18664508c..363904185 100644
--- a/tests/FSharpLint.FunctionalTest/FSharpLint.FunctionalTest.fsproj
+++ b/tests/FSharpLint.FunctionalTest/FSharpLint.FunctionalTest.fsproj
@@ -8,6 +8,7 @@
   <ItemGroup>
     <Compile Include="TestConsoleApplication.fs" />
     <Compile Include="TestApi.fs" />
+    <Compile Include="Attributes.fs" />
   </ItemGroup>
 
   <ItemGroup>